Results 251 to 260 of about 202,648 (320)

A Mechanistic Study on the Photocatalytic Conversion of Methane to Ethane on TiO₂ and Au-TiO₂ Nano Clusters. [PDF]

J Phys Chem A
Kaipanchery V, Rutkowska-Zbik D.
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Catalytic Hydrogenation Dominated by Concerted Hydrogen Tunneling at Room Temperature. [PDF]

ACS Cent Sci
Wu Q, Liu P, Zhang XG, Fan C, Chen Z, Qin R, Gao YQ, Zhao Y, Zheng N.   +8 more
europepmc   +1 more source

Enantioselective Intramolecular C-H Alkylation Catalyzed by a Nonsymmetric Chiral Cobalt Porphyrin. [PDF]

J Am Chem Soc
Buchelt C, Breitenlechner S, Zuber J, Huber SM, Bach T.   +4 more
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Triggering and Preventing Cyclization of o-Amino-Guanidinobenzenes to 2-Amino-Benzimidazoles. [PDF]

Chemistry
Henel CLM, Michel E, Zeitler D, Hübner O, Kaifer E, Himmel HJ.   +5 more
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Self-passivation reduces the Fermi level pinning in the metal-semiconductor contacts. [PDF]

Nat Commun
Xiang Z, Luo JW, Li SS.
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DMF/DMSO-catalyzed selective ring-opening polymerization of salicylate cyclic esters. [PDF]

Chem Sci
Yao G, Liu J, Fu H, Wang C, Li G, Cao L, Pan X, Wu J.   +7 more
europepmc   +1 more source

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Absorption Wavelength Along Chromophore Low-Barrier Hydrogen Bonds

SSRN Electronic Journal, 2021
In low-barrier hydrogen bonds (H-bonds), the pKa values for the H-bond donor and acceptor moieties are nearly equal, whereas the redox potential values depend on the H+ position. Spectroscopic details of low-barrier H-bonds remain unclear. Here, we report the absorption wavelength along low-barrier H-bonds in protein environments, using a quantum ...
Masaki Tsujimura, Keisuke Saito, Hiroshi Ishikita   +2 more
openaire   +1 more source

Low-Barrier Hydrogen Bonds and Enzymic Catalysis

Science, 1994
Formation of a short (less than 2.5 angstroms), very strong, low-barrier hydrogen bond in the transition state, or in an enzyme-intermediate complex, can be an important contribution to enzymic catalysis. Formation of such a bond can supply 10 to 20 kilocalories per mole and thus facilitate difficult reactions such as enolization of ...
W W, Cleland, M M, Kreevoy
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Low-barrier hydrogen bonds in proteins

Crystallography Reviews, 2013
Hydrogen bonding interactions are one of the most important chemical interactions among materials, especially biological materials, which help confer specificity, which is crucial for their efficient functioning. Recently, low-barrier hydrogen bonds (LBHBs) have been proposed to play a critical role in enzyme catalysis.
M. V. Hosur, R. Chitra, Samarth Hegde, R. R. Choudhury, Amit Das, R. V. Hosur   +5 more
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Low barrier hydrogen bonds within salicylate mono-anions

Tetrahedron, 2001
Abstract Progressive incorporation of electron-withdrawing substituents into the aromatic ring of salicylic acid selectively acidifies the ArOH group, until the intrinsic pKa values of the ArOH and ArCO2H groups become matched, as in the case of 3-chloro-5-nitrosalicylic acid.
William L. Mock, Layne A. Morsch
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